I love miso soup. One of my favorite things to add is cubed sweet potato and a teaspoon of tahini for added creaminess. Then I have different variations on that:
sweet potato/ wakame/ leek/tahini
sweet potato/ bok choy/ daikon/ tahini
sweet potato bok choy/ bean sprouts/ tahini
sweet potato/ asparagus/ wakame/ tahini
(If you can't tell I love sweet potato=)
Then I also like:
sweet corn/ wakame/ zucchini
I usually always use white miso. I like red miso better in other types of cooking. Sometimes I add tofu too.
I'd love other ideas!
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